AD660BN

Overview

The AD660BN is a monolithic 16-bit serial/byte DACPORT manufactured by Analog Devices Inc. It integrates an on-chip buried Zener voltage reference, double-buffered latches, and an output amplifier. The device operates within a temperature range of −40°C to +85°C and utilizes a BiMOS II process. Key electrical specifications include ±1 LSB integral nonlinearity (INL) and differential nonlinearity (DNL), 15-bit monotonicity over temperature, and a typical glitch impulse of 15 nV-s. The internal reference is laser-trimmed to 10.000 V with a drift of ±15 ppm/°C. Output ranges are pin-programmable for unipolar (0 V to 10 V) or bipolar (−10 V to +10 V) configurations.

Feature Summary

• Complete 16-bit digital-to-analog function with integrated output amplifier and buried Zener reference.
• Pin-selectable serial or byte input interface with double-buffered latches for simultaneous multi-DAC updates.
• Asynchronous clear function sets output to 0 V regardless of unipolar or bipolar mode.
• Low total harmonic distortion plus noise (THD+N) of 0.009% and signal-to-noise ratio (SNR) of 83 dB.

Applications

• Precision test equipment requiring high linearity and low noise.
• Industrial instrumentation systems needing stable 16-bit resolution.
• Multi-channel data acquisition systems utilizing daisy-chain capabilities.

Procurement Notes

Verify the specific grade suffix BN against the ordering guide to confirm the plastic DIP package and temperature range. Ensure supply voltages match the specified limits: +VCC between +13.5 V and +16.5 V, −VEE between −13.5 V and −16.5 V, and +VLL at 5 V. Confirm that the application environment remains within the −40°C to +85°C operating range defined for this grade.

Selection Notes

Select the AD660BN when 15-bit monotonicity and ±1 LSB INL/DNL are required without external trimming. Choose this component if a single-supply digital interface (5 V) is needed alongside dual analog supplies. Consider the internal 10 V reference for cost-sensitive designs; however, for lower drift requirements, an external precision reference such as the AD587 or AD688 should be used instead of the internal source.

Part Context

The AD660 belongs to the DACPORT family, which combines high-precision bipolar linear circuitry with low-power CMOS logic on a single chip. The BN grade specifically denotes the commercial temperature range variant packaged in a 24-lead 300 mil plastic DIP. Other grades include AN (plastic DIP), AR/BR (SOIC), and SQ (CERDIP/Military).

Replacement Considerations

Publicly confirmed substitute part numbers for the AD660BN are not available in the provided documentation. Designers should evaluate modern replacements based on resolution, interface compatibility, and package dimensions, noting that direct pin-for-pin substitutes may require schematic adjustments due to architectural differences.